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Simplifying (4n + 21) + (2n + 21) = 180 Reorder the terms: (21 + 4n) + (2n + 21) = 180 Remove parenthesis around (21 + 4n) 21 + 4n + (2n + 21) = 180 Reorder the terms: 21 + 4n + (21 + 2n) = 180 Remove parenthesis around (21 + 2n) 21 + 4n + 21 + 2n = 180 Reorder the terms: 21 + 21 + 4n + 2n = 180 Combine like terms: 21 + 21 = 42 42 + 4n + 2n = 180 Combine like terms: 4n + 2n = 6n 42 + 6n = 180 Solving 42 + 6n = 180 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-42' to each side of the equation. 42 + -42 + 6n = 180 + -42 Combine like terms: 42 + -42 = 0 0 + 6n = 180 + -42 6n = 180 + -42 Combine like terms: 180 + -42 = 138 6n = 138 Divide each side by '6'. n = 23 Simplifying n = 23
| 4c-3-9c=3c-19 | | (3+v)(3)= | | 3/16=x/1400 | | -4(w+3)(-w-9)=0 | | 2(1+2n)= | | (3b^3+5b^2-7b)-(2b^3+3b-5)= | | f(x)=10-3x | | 6(5k)= | | (3+s)+4= | | 2(1+2h)= | | 12+g=21 | | 2(n+12)=3(n+9)+6 | | (3+y)+4= | | 4+(g+2)= | | (3z)(3)= | | 7(3c)= | | (-4.6x^3+5.6x-0.3)+(9.8x^2+4.5x-1.7)= | | 20=a-6a | | 6v-30=9v | | 3e-7=17 | | -34-7x=10x+51 | | -2u(u-5)(u+1)=0 | | 10x^3-8x^2-6x= | | 8ft=r*t | | 2(2v)= | | 2x=12-(4x+24) | | 4(6p)= | | 2(w-3)=3w+4-3(-3w-2) | | 4x=12-(2x-24) | | (1+w)+4= | | 2(2+3)=3 | | (y+2)+2= |